Ubuntu: Problem getting KNIME installed

Now I’m some some taps further.

I’ve found this thread Install KNIME on Linux (Ubuntu) here in the forum.
So I added the mentioned PATH extensions to the ~/.bashrc

export PATH=$PATH:“/home/$USER/bin/KNIME”

After granting execution rights to the file “knime” I can start it.

But it immediately throws an error.

JVM terminated. Exit code=13
/home/XXXX/bin/KNIME//plugins/org.knime.binary.jre.linux.x86_64_17.0.5.20221116/jre/bin/java
-Djava.security.properties=plugins/org.knime.binary.jre.linux.x86_64_17.0.5.20221116/security.properties
-server

I’ve identified that the path name contains two //.
The extended path in ~/.bash.rc does not end with /.

What do I make wrong?
Where’s the root cause of this?